Adaptive Guidance Law Based on Variable Structure

For the case of a planar interception,this paper proposes a new guidance law with strong robustness and adaptability,based on an adaptive trending-law of sliding-mode.The maneuvering acceleration of target is regarded as a disturbance with boundary,and the LOS (Line of Sight) angular rate is chosen as the output state to be controlled to zero in the guidance law,and meanwhile autopilot dynamics of missile is considered.The guidance law is very simple,so it more convenient for comprehensible and practical implementation.The simulation results show that it is effective.